Two Masses Are Suspended by a Cord That Passes Over

Multiple Choice

Two masses are suspended by a cord that passes over a pulley with negligible mass. The cord also has negligible mass. One of the masses, m₁, has a mass of 7.0 kg and the other mass, m₂, has a mass of 3.0 kg. The pulley turns on a shaft through the center of the pulley, which supports the pulley and all the masses. The vertical force of the shaft on the pulley is

A) 49 N upward.
B) 49 N downward.
C) 82 N upward.
D) 82 N downward.
E) 98 N upward.